Question:  what is node limit on RAC?

Any body know what is the max number of node the RAC can has?
Thanks,

Why do you ask?
Practically, the limit is far, far more likely to be dictated by your application(s) than by Oracle. As with any scale out solution, there is a declining marginal benefit as you add nodes. Beyond that, individual applications are generally not built in such a way that they scale nearly as well as RAC itself does. So you are almost always limited by the scalability of your application long before you are limited by the scalability of RAC.
Justin

Similar Messages

  • Private Interconnect: Should any nodes other than RAC nodes have one?

    The contractors that set up our four-node production 10g RAC (and a standalone development server) also assigned private interconnect addresses to 2 Apache/ApEx servers and a standalone development database server.
    There are service names in the tnsnames.ora on all servers in our infrastructure referencing these private interconnects- even the non-rac member servers. The nics on these servers are not bound for failover with the nics bound to the public/VIP addresses. These nics are isolated on their own switch.
    Could this configuration be related to lost heartbeats or voting disk errors? We experience rac node expulsions and even arbitrary bounces (reboots!) of all the rac nodes.

    I do not have access to the contractors. . . .can only look at what they have left behind and try to figure out their intention. . .
    I am reading the Ault/Tumha book Oracle 10g Grid and Real Application Clusters and looking through our own settings and config files and learning srvctl and crsctl commands from their examples. Also googling and OTN searching through the library full of documentation. . .
    I still have yet to figure out if the private interconnect spoken about so frequently in cluster configuration documents are the binding to the set of node.vip address specifications in the tnsnames.ora (bound the the first eth adaptor along with the public ip addresses for the nodes) or the binding on the second eth adaptor to the node.prv addresses not found in the local pfile, in the tnsnames.ora, or the listener.ora (but found at the operating system level in the ifconfig). If the node.prv addresses are not the private interconnect then can anyone tell me that they are for?

  • How to migrate DB from single node 10gR2 to RAC 11gR2 on diff platform?

    How to migrate DB from single node 10gR2 to RAC 11gR2 on different platform with possible minimum downtime? We have a situation of upgrade/migrate oracle 10gR2 single instance DB to 2-node RAC 11gR. The source OS is Solaris 10 on SPARC and the target OS is Linux (the target servers could be changed to Solaris 11 x86 if needed). What is the best solution on that?
    Thanks,

    Technically, can do the following for upgrading and migration?
    1. Create 11gR2 oracle home on the same server and upgrade the database from 10gR2 to 11gR2 by running conversion (2 hour down time?)
    2. Set up Heterogeneous Primary and Physical Standbys by RMAN. The standby is the RAC with ASM. No need down time. (from Solaris Space to Linux - this may be a problem)
    3. At the cutoff time, activate the standby DB from the RAC ASM.
    If feasible, do we have some detail guild line for each step?

  • What is exactly clusterware in RAC

    What is exactly clusterware in RAC? Is it same as having a shared disk or is it the RAC software itself?
    I got confused while reading below sentence.
    "If you are using Oracle clusterware you can add nodes dynamically. "
    Can someone explain what it is?

    user6440749 wrote:
    What is exactly clusterware in RAC? Is it same as having a shared disk or is it the RAC software itself?It is software used to coordinate one or more computers in a cluster.
    It makes use of network and often makes use of a shared-writeable disk.
    It makes sure all computers in a cluster, that are supposed to be operating in the cluster, can communicate. It provides diagnostics and takes action if the computer it protects is no longer functioning correctly as part of the cluster.
    For RAC, Clusterware is the backbone software that provides the infrastructure for inter-instance communication.

  • My rescue email is a deleted email and i have no idea what the answers are to my security questions- what do I do? How do I change the rescue email?

    My rescue email is a deleted email and i have no idea what the answers are to my security questions… what do I do? How do I change the rescue email?

    You will need to contact Apple support. You can use the link in the quote below from If you forgot the answers to your Apple ID security questions - Apple Support
    If you couldn't send a reset email, don't have a rescue email address, or can't access email at your rescue email address, contact Apple Support.

  • TS2446 So I have an iphone and for some reason I don't know the password for my Apple ID so I can't download apps and I don't have the password to my email to change it and I don't know the secret questions , what can I do to make a new Apple ID ?

    So I have an iphone and for some reason I don't know the password for my Apple ID so I can't download apps and I don't have the password to my email to change it and I don't know the secret questions , what can I do to make a new Apple ID ?

    I have the same problem - it is maddening. I rely on this iPad for work so this is not just an annoyance! The above solutions of changing the appleid on the device or on the website do not work.
    The old email address no longer exists - I haven't used it in a year probably and I no longer have the account.  I logged into the appleid website and there is no trace of the old email address so there is nothing that can be deleted or changed there.  On the iPad there is no trace of the old email address so nothing can be deleted there either. I have updated the iPad software and the same problem comes right back.  Every 2 seconds I am asked to log in using the old non-existent email.  The device is currently useless.
    The only recent change to anything was the addition of an Apple TV device, which was set up using the correct login and password.
    Does anyone have any ideas? The iPad has been backed up to the iCloud so presumably it now won't recognize the current iCloud account? So restoring may notbe an option?

  • Hello I have an apple Id on my ipad 2 and I want to change my password of my Id but I could not do it because I don't remember the answers to the security questions what to do?

    Hello I have an apple Id on my ipad 2 and I want to change my password of my Id but I could not do it because I don't remember the answers to the security questions what to do?

    Did you setup your account with a rescue email address?  If so...
    http://support.apple.com/kb/HT5312

  • What is the limit of voice mail?  Ive been told my voicemail box is full but I have less than a months worth stored

    what is the limit in voicemail?  I have a new iphone4 and have been told my voicemail box is full but I also deleted voice mail before 13 June

    With AT&T, the limit is 40 messages at 4 minutes per message.
    See the AT&T VVM User Guide

  • My tel Goes after 10 minutes offline, apears à enige Apple, and i have to unlock again. People are not able to call me while THE Apple apears. Question what can be THE solution ?? It is à 3GS tel iOS 4.2.1

    My tel Goes after 10 minutes offline, apears à enige Apple, and i have to unlock again. People are not able to call me while THE Apple apears. Question what can be THE solution ?? It is à 3GS tel iOS 4.2.1

    Hi Richard,
    You mentioned that 'Apple put the AirPrint spec out there for all printer makers'. I've been looking around but I haven't found any spec. Where did you find it?
    Do printer makers have to buy a license in order to be able to advertise that they've implemented the AirPrint protocol? Is there maybe an Apple review process in place?
    TIA
    Geert

  • My tel Goes after 10 minutes offline, apears à white Apple, and i have to unlock again. People are not able to call me while THE Apple apears. Question what can be THE solution ?? It is à 3GS tel iOS 4.2.1

    My tel Goes after 10 minutes offline, apears à white Apple, and i have to unlock again. People are not able to call me while THE Apple apears. Question what can be THE solution ?? It is à 3GS tel iOS 4.2.1

    Hi Richard,
    You mentioned that 'Apple put the AirPrint spec out there for all printer makers'. I've been looking around but I haven't found any spec. Where did you find it?
    Do printer makers have to buy a license in order to be able to advertise that they've implemented the AirPrint protocol? Is there maybe an Apple review process in place?
    TIA
    Geert

  • I do not remember the answer to my security questions, what do I do?

    I do not remember the answer to my security questions, what do I do because I cannot proceed further into my account without those answered correctly.

    See Kappy's great User Tips.
    See my User Tip for some help: Some Solutions for Resetting Forgotten Security Questions: Apple Support Communities https://discussions.apple.com/docs/DOC-4551
    Send Apple an email request for help at: Apple - Support - iTunes Store - Contact Us http://www.apple.com/emea/support/itunes/contact.html
    Call Apple Support in your country: Customer Service: Contacting Apple for support and service http://support.apple.com/kb/HE57
     Cheers, Tom

  • Question: What makes of projectors can be connected to MacBook

    Question: What makes of projectors can be connected to MacBook, also what kind of cable do I need?

    Hi,
    Modbus is restricted to addressing 247 devices on one data link, which limits the number of field devices that may be connected to a master station.
    However, if you want to increase the number of slaves, you may use MODBUS/TCP.
    Here is a link that might help you:
    http://modbus.control.com/thread/1026247380.
    The Schneider electric 174CEV30010 Modbus to Ethernet bridge is capable of addressing Modbus slaves from 1 to 247.
    The actual number of devices which can be physically connected depends on the medium used and not on the fact it is Modbus.
    Some examples:
    RS232 is a 2 device point to point connection when using copper, however when using fiber (or other modems) it is possible to connect up to the maximum of 247 devices.
    RS485 is multi-drop and supports 32 devices on a single network. When a repeater is used, on copper wire, the number of devices can usually be increased to 64.
    Hope this helps.
    Regards,
    Rohan Sood
    Applications Engineer
    National Instruments

  • HT5699 Hi.  I forgot the answers of my security questions , what should I do?

    Hi.  I forgot the answers of my security questions , what should I do?

    Read this about how to change the security questions: http://support.apple.com/kb/HT5312
    If you can't use these procedures you will have to contact Apple. See http://support.apple.com/kb/HT5699
    You can also call your country number from http://support.apple.com/kb/HE57 and ask to speak with Account Security.
    You can also go to the ExpressLane at https://expresslane.apple.com and then iTunes > iTunes Store > Password and Security Questions and fill out the form.

  • What is Node Manager ?

    Hi
    I have been reading documents on Oracle Fusion Middleware 11g. At lot of places 'Node Manager' is mentioned across these documents.
    Please can someone explain here what is Node Manager and what it is its role in OFMW 11g ?
    Cheers
    Mayur

    Hi Mayur,
    For more details please refer to: http://weblogic-wonders.com/weblogic/2010/06/18/weblogic-initials/
    <b><font color=maroon> What is NodeManager?</font></b>
    A Node Manager process is not associated with a specific WebLogic domain but with a machine. Node Manager process to control server instances in any WebLogic Server domain until the server instances reside on the same machine as the Node Manager process.
    Node Manager is a WebLogic Server utility that enables you to start, shut down, and restart Administration Server and Managed Server instances from a remote location. Although Node Manager is optional, it is recommended if your WebLogic Server environment hosts applications with high availability requirements.
    A Node Manager process is not associated with a specific WebLogic domain but with a machine. You can use the same Node Manager process to control server instances in any WebLogic Server domain, as long as the server instances reside on the same machine as the Node Manager process.
    <b><font color=maroon>Why We Need Nodemanagers?</font></b>
    1). It can Start, Shut Down, and Restart an Administration Server which has assigned a Machine.
    2). It can Start, Shut Down, and Restart an Managed Server which has assigned a Machine.
    3). It can Restart Administration and Managed Servers. (Crash Recovery of Servers is an Interesting feature)
    4). It can be used to Monitor Servers and View Log Data
    <b><font color=maroon>Types of NodeManagers?</font></b>
    *1). Java Based Nodemanager:* This can be used in Windiows as well as UNIX based Operating systems. Java Based Node Manager is not supported on Open VMS, OS/390, AS400, UnixWare, or Tru64 UNIX.
    *2). Script Based Nodemanager:* This nodemanager can be used in UNIX based operating systems. The advantage of the script-based Node Manager is that it can remotely manage servers over a network that has been configured to use SSH.
    For More Information on NodeManager please refer to:
    http://download.oracle.com/docs/cd/E13222_01/wls/docs90/server_start/nodemgr.html
    And
    http://blogs.oracle.com/jamesbayer/2010/01/weblogic_nodemanager_quick_sta.html
    Thanks
    Jay SenSharma

  • I forgot my security questions, what can I do?

    I forgot my security questions, what can I do?

    You need to ask Apple to reset your security questions; ways of contacting them include clicking here and picking a method for your country, phoning AppleCare and asking for the Account Security team, and filling out and submitting this form.
    They wouldn't be security questions if they could be bypassed without Apple verifying your identity.
    (103388)

Maybe you are looking for

  • Front End to Oracle Database - Advice Needed

    Hi My company has recently purchased an Oracle Database. Are there any advantages in creating the front end in Oracle as opposed to writing the front end in Java. I am interested to know if one method is preferred over the other. I was planning on wr

  • Telephone number suppliers/customers

    Does anyone know the accurate field/table/view for the contact telephone number for your suppliers AND customers in EBS payabales/receiveables. I ideally need a query to return a) supplier name, ID, address fields, contact phone number b) customer na

  • Help with CastException please

    Hi, i am working on program that converts a string from infix notation to postfix notation and then evaluates it. I am having a problem with the evaluation part. lets say we have 2 + 4 - 3 the postfix will be 2 4 + 3 - The program does 2 + 4 and push

  • Can not export to DVD?

    i have Premiere CS3 and if i want to burn DVD straight from it! File/ Export/ DVD,   nothing. This option does not exist? also i do not have, export to MPG2 in adobe media encoder?

  • Modification of xml

    Hi All, When i use code as Element rootEle = dom.createElement("packageBody"); rootEle.setAttributeNS("http://www.w3.org/2001/xmlns/", "xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance"); I get o/p as <packageBody xmlns:xsi="http://www.w3.org/1